Steam-boiler superheater.



H. H. VAUGHAN.

STEAM BOILER SUPERB-EMM.

APPLIUATION FILED 0GT.12, 1910.

Patented May 30, 1911.

3 SHEETS-SHEET l.

NBTN ESSES H. Hl VAUGHAN.

STEAM BOILER SUPERHEATER.

APPLIOATION FILED OGT. 12, 1910. 994x345, Patented May 30, 1911.

3 SHEETS-SHEET 2f FI G B..

H. H. VAUGHAN.

STEAM BOILER SUPERHEATER.

APPLIGATION FILED 00T.12, 1910.

99%@451 Patented May 30, 1911.

3 SHEETS-SHEET 3.

vwlmassis f wm-iw 4 nwe ma HENRY E. VAUGHAN, OF lJlGNT'EtEl-lll, QUEBEC, CANADA, ASSGNOR OF ONE-HALE? TG LOCOMGTVE SIPERHEATER CO., JERSEY.

or new Yoeri, N. Y., e.

CORYORTION OF NEW implication filed october l2, 3.510. Serial No. 586,69.

To all whom it may concern:

Be it known that l, l-lnrrnr "il, Venetien, of Montreal, in the Province of Quebec and Dominion of Canada, have invented a certain new and useful lmprovement in Steam- Boiler Superheaters, of which improvement the followino is a specification.

My present invention relates to superheaters which are particularly designed for application in locomotive boilers in which l l.k iront section,

the fire tubes are divided into a rear and a forward set, separated by an intermediate combustion chamber, a construction which has been put into practice to a considerable extent in Malletlocomotives.

rlhe object of my invention is to provide, for a boiler of the type referred to, a superheater which shall present the advantages of simplicity and economy of construction, capability of removal and replacement of individual members without disturbance of others, and exemption from undue strain at points of support on the boiler, and liability to promote the collection of cinders in its inclosing combustion chamber.

rlhe improvement claimed is hereinafter fully set forth'. Y y

ln the accompanying drawings: Figure 1 is a diagrammatic side view, in elevation, ot a locomotive engine having` my improvement applied; Fig. 2, a similar view, with the combustion chamber and superheater in section; Fig. 3, a partial plan or top view, on an enlarged scale, with the cover of the superheater casing removed Fig. 4C, a vertical longitudinal central section through the combustion chamber and superheater: and, Fig. 5, a vertical transverse section through the same. f

My invention is herein exemplified as applied in connection with the boiler 4, of a locomotive engine of the Mallet l articulated compoundtype, comprising a rear frame, 8, supported on a plurality of driving wheels, l, and a front frame, 8a, supported on a plurality of driving wheels, l, The rear frame carries a pair oi' high pressure cylinders, 12a, the pistons of which are coupled to crank pins on the driving wheels, l, andthe front frame carries a pair of low pressure cylinders, lf, the pistons of which are coupled to cranlr pins on the driving frame, 8,

tutes, practically,

' about the level of the top rows of the rear section, and is closed at its vtop as lwhich is of the following construction.

wheels, la. JThe front and rear frames are coupled, in 'the longitudinal central plane of the locomotive, by a pivot pin, 8b.

rlhe boiler, 4l, which is secured to the rear is divided by a combustion cham bei', its, length, into rear and front sections, each of which is provided with an independent set of ytire tubes. The rear section is the boiler proper or steam generating section, and the which is of smaller diameter and contains a larger number of tubes, is continuously filled withy water, and Lconstia feed water heater, from which heated water is supplied to the rear section through pipes, 4t. rlhe tubes, le, of the rear section, extend from the rebon, 5, to the rear end of the combustion chamber, and the tubes, 4, of the front section, er:- tend from the front end of the combustion chamber to the smoke box, 4a. rlhe shell or wall of the combustion chamber, which is curved concentrically with those of the rear and front boiler sections, entends only to tubes of hereinafter describedln the practice of my invention, l provide a superheater casing, il", which is of rectangular form, and is independent of the shell of the combustion chamber, and connected theretoby reinforcing plates, liw, of lighter metal than said shell. rlhe su perheater casing,` is closed-atits top by a removable cap plate, 1l, and the casing and cap plate consequently form the upper Closure of the combustion chamber, rllhe superheater casing,- constitutes a light superstructure exterior to the boiler, which incloses and supports the superheater proper,

A horizontal saturated steam header, 70, is bolted to, lugs on one side of the superheater casing, near sequently entirely above the boiler. tubes, said header being provided with a plurality of laterally extending branches, 701. A siniilar superheated steam header, 70a, is bolted to the opposite sideof the superheater casing, andfis provided wit-ha plurality of laterally extending branches, 270e,

alternated in position with the branches,

located about the middle of its' Cil the top thereof and conm which are preferred manner.

of the saturated steam header. Each of the branches of the saturated steam1 headerA is connected with the adjacent branch oi' the superheated steam header by a plurality ot header branches into the combustion chamber and extending across the line of traverse of the gases of combustion through the combustion chamber in their passage from the fire tubes of the rear section of the boiler to those of the front sectionu The superheating pipes do not extend entirely to the bottom of the combustion chamber, but are made of such length that a space is left below them, so that any cinders that may tend to be deposited in the combustion chamber will be drawn therefrom through thc bottom rows of front tubes, d. By reference to Figs. 4 and 5, it will be seen that in normal position, the Width of the superheating pipe elements is greater than that of the spaces between the header branches, but that when disconnected from the header branches and turned through an angle of ninetyv degrees, they may be passed freely through said spaces. This construction attains the important advantage in practice ot enabling any one or more of the superheating pipes to be Withdrawn and replaced whenever desired, Without-interfering with the other pipes of the set. e

Steam is supplied from the boiler to lthe saturated steam-header, 70, through pipes, 6l, and after passing through, and being superheated in, the set of superheating pipes, 69, enters the superheated steam header, 70, and is thence delivered through pipes, 63,to the cylinders of the locomotive.

In the instance shown, the steam is superheated in its passage from the boiler to the high pressure cylinders, l2, but it will be obvious that if preferred it may be arranged for the steam t'o pass through the superheater in its passage from the .high pressure cylinders, 12, to the low pressure cylinders, 12f, and that in general the superheater described-is adapted to heat the steam that it may be desirable to pass through it.

The supcrhoatingpipes, (30, may be, con-.

nected to the headers in any suitable and ln the instance shown, detachable fittings, 70k, are screwed into the tops of the header branches, 70C, 70?, and the ends of the superheating pipes are screwed into lateral openings in the fittings. Under this construction, any of the superheating pipes may bc readily repaired and segnet replaced when desired. The header branches are strengthened by transverse diaphragms, OtI

Cleaning openin s,4, closed by removable caps, 4H, are ormed inthe bottom of the combustion chamber, and in order to remove any deposit of soot which may collect on the superheating pipes, blower pipes, 10", having transversely enlarged nozzles, are littcdvin the lower portion of the combustion chamber, said.- pipes being supplied `with steam by a pipe, 70W, controlled bya valve, 70X, and discharging jets of steam, diagonally across theA combustion chamber, among the rows of superheating pipes.

lt will be seen that under the above de- 2 scribed construction, close spacing of the vertical rows of superheating pipes, and consequent maximum area of superhcating surface, is obtainable,

importance in" practice, of disconnecting and turning around any one or more of the several pipes, so that anyl desired' element of the piping may be withdrawn, when desired, without interference by or disturbance of other elements. The presentation oi an entirely open space below the superheating pipes is also an important advantage, as it enables any deposit of cinders to be drawn through the lower front tubes and thus y'prevents clogging Yof the and there is also afforded the capability, which is of material combustion chamber and tubes. The sup l port of the superheater upona light structure exterior to the body of the boiler vadmits of its ready insertion and replacement,`v

and obviates the liability to straining and breakage of the header castings which would obtain if the superheater was directly connected to the heavy plates of the boiler.

l claim as myinvention and desire to secure by Letters Patent:

1.` The combination, with a locomotive boiler, of aA superheater comprising a saturated steam header havinga plurality of horizontally extending lateral branches, a

superheated steam header having a pluralnated in position with those of the saturated steam header, branches being located entirely above the boiler tubes, and a plurality of klooped or return bend superheating pipes, connected at their ends to the header branches and depending' therefrom in vertical rows in the path of the gases of combustion from the tubes.

Q. The combination, witha locomotive boiler having an open topped combustion chamber, ot' a superheatcr casing in the form of a light superstructure exterior to the boiler, which is located above and constitutes the top closure ot the combustion chamsaid headers vand 1101 ity of similarly extending branches, alter- .Y

'and having a plurality enanas ber, and a superheater supported in the casing independently of the shell of the combustion chamben A 3. The combination, with a locomotive boiler having open 'topped combustion chamber, of a superheater casing in the form of a light superstructure exterior to the boiler, which is located above and connected to said combustion chamber, a removable cap plate closing said casing, and a superheater supported in said casing independently of the shell of the combustion chamber, of depending looped or return bend superheating pipes disposed 'in vertical rows in the direct path of the gases through thev combustion chamber.

Ll. rvvlhe combination with a locomotive .1 7 r boiler having an open topped combustion chamber, of an independent superheater casing which is exterior to the boiler -and con- Y stitutes the top closure of the combustion chamber, side connections securing said casing to said'chamber, a removable cap plate closing said casing, a saturated and a superheated steam header, secured to opposite sides of said casing, and a plurality of looped or return bend superheating pipes communicating at their ends with said headers and depending in vertical rows in the direct path of the gases 'through the combustion chamber.

5. The combination, with a locomotive boiler having an open topped combustion chamber, of an independent superheater casing which is exterior to the boiler and constitutes the top closure of the combustion chamber, side connections securing said casing to said chamber, a removable cap plate closing said casing, a saturated and a superheated steam header, each secured to said casing, and a plurality of looped or return bend superheating pipes communicating at their ends with said headers and extending in vertical rows in the direct path ot the gases of combustion from the boiler tubes, the lower ends of the superheating pipe elements being separated by a clear space from the bottom of the combustion chamb er.

G. The combination, with a locomotive boiler having an open topped combustion chamber, of a superheater casing secured to the top oit said combustion chamber, a removable cap plate closing said casing, a saturated steam kheader secured to one side of said casing and having a plurality of horizontally extending lateral branches, a superheated steam header secured to the opposite sides off said casing and having a plurality of similarly extending branches alternated in position with those of the saturated steam header, and-a plurality of looped or return bend superheating pipes, connected chamber, and a plurality at their ends to the header branches and depending theretrom in vertical rows in the path of the gases of combustion from the boiler tubes.

7. The combination, with a locomotive boiler having an open topped combustion chamber, of an independent superheater casing located above said combustion chamber, reinforcing plates, the shell of the combustion chamber, securing the casing to the combustion chamber, a removable capr plate closing the casing, a saturated and a superheated steam header, secured to opposite sides plurality of looped or return bend superheating pipes communicating at their ends with said headers and depending in vertical rows in the direct path of the gases through the combustion chamber.

8. The combination, with a locomotive boiler having an open topped combustion chamber, of a superheater casing located above Iand connected to said combustion chamber, a superheater supported in said casing, and having a plurality of depending looped or return bend superheating pipes disposed in vertical rows in the combustion of valve controlled blower `pipes having their nozzles disposed to direct jets of steam across the combustion chamber among the rows of superheating pipes therein.

9. rTher combination', with a locomotive boiler, of a superheater comprising a saturated steam header having a plurality of horizontally extending lateral branches, a superheated steam header having a plurality of similarly extending branches alternated in position with those of the saturated steam header, said headers and branches; being located entirely above the boiler tubes, a plurality 'of looped or return ing pipes depending in vertical rows in the path of the gases of combustion from the tubes, and fittings secured removably to openings in the tops of the header branches, and having lateral openings communicating with the superheating pipes.

10. The combination, with a locomotivey boiler, of a superheater comprising a saturated steam header having -a plurality of horizontally extending lateral branches, 'a superheated of similarly extending branches, alternatedl in position with those of the saturated steam header, said headers and branches being located entirely r-above the boiler tubes, and a plurality of double looped or return bend superheating pipes connected tl' eir ends to the header branches and depffi ing there from, in vert-ical rows, throun the spaces between the header branches, in the path of the 'gases of combustion from the tubes, the

of lighter metal thanv of the casing, and a Abend superheatsteam header having a plurality upper portions of the superheating pipe eleturned at angles to their normal positions in ments being in two lengths of less total service. y Width than the space between two header branches, and the lower in four lengths of HENRY H VAUGHAN' greater total Width than said spaces, Where- .lVtnesseSz by said. superheating pipe' elements may be FRED LE GNTER,

separately inserted and Withdrawn by being ALBERT LOVE.

Copies of this patent may be obtained for ve ce'nts each, by addressing the Commissioner of Patents;

' Washington, D. C. 

